Direct Conversion of <i>N</i>-Alkylamines to <i>N</i>-Propargylamines through C–H Activation Promoted by Lewis Acid/Organocopper Catalysis: Application to Late-Stage Functionalization of Bioactive Molecules
作者:Jessica Z. Chan、Ahmet Yesilcimen、Min Cao、Yuyang Zhang、Bochao Zhang、Masayuki Wasa
DOI:10.1021/jacs.0c08599
日期:2020.9.23
In the past, such transformations were carried out under oxidative conditions, and the enantioselective variants were confined to tetrahydroisoquinoline derivatives. Here, we disclose a method for union of N-alkylamines and trimethylsilyl alkynes, without the presence of an external oxidant, and promoted through cooperative actions of two Lewis acids, B(C6F5)3 and a Cu-based complex. A variety of propargylamines
开发了一种将 N-烷基胺的 α-CH 键转化为 α-C-炔基键的有效催化方法。过去,这种转化是在氧化条件下进行的,对映选择性变体仅限于四氢异喹啉衍生物。在这里,我们公开了一种在不存在外部氧化剂的情况下结合 N-烷基胺和三甲基甲硅烷基炔的方法,并通过两种路易斯酸 B(C6F5)3 和 Cu 基络合物的协同作用进行促进。可以高非对映选择性和对映选择性合成多种炔丙胺。生物活性胺的后期位点选择性修饰证明了该方法的实用性。介绍了阐明催化过程的各种机制细微差别的动力学研究。